A set of .NET Framework managed libraries for developing graphical user interfaces.
The main difference between "Windows Forms App (.NET)" and "Windows Forms App (.NET Framework)" is that the former uses the latest .NET versions (like .NET 5, 6, 7, etc.), making it ideal for new projects with modern features and future updates, while the latter uses the older .NET Framework (up to version 4.8), making it better suited for maintaining and extending existing legacy applications.